L.4.8.3 Color Transforms

A color transform is a modification to related properties of an underlying color. For example, transparency is a property that is related to color. Color transforms are specified as child tags off any color model’s tag.

<a:solidFill>
  <a:srgbClr val="00B050">
    <a:alpha val="51000"/>
  </a:srgbClr>
</a:solidFill>

The following are the allowed color transforms and descriptions of the transformations they apply:

tint: Yields a lighter version of its input color. A 10% tint is 10% of the input color combined with 90% white. shade: Yields a darker version of its input color. A 10% shade is 10% of the input color combined with 90% black. comp: Yields the complement of its input color. For example, the complement of red is green. inv: Yields the inverse of its input color. For example, the inverse of red (1,0,0) is cyan (0,1,1). gray: Yields a grayscale of its input color, taking into relative intensities of the red, green, and blue primaries. alpha: Yields its input color with the specified opacity, but with its color unchanged. alphaOff: Yields a more or less opaque version of its input color. An alpha offset never increases the alpha beyond 100% or decreases below 0%; i.e., the result of the transform pins the alpha to the range of [0%,100%]. A 10% alpha offset increases a 50% opacity to 60%. A -10% alpha offset decreases a 50% opacity to 40%. alphaMod: Yields a more or less opaque version of its input color. An alpha modulate never increases the alpha beyond 100%. A 200% alpha modulate makes an input color twice as opaque as before. A 50% alpha modulate makes an input color half as opaque as before. hue: Yields the input color with the specified hue, but with its saturation and luminance unchanged. hueOff: Yields the input color with its hue shifted, but with its saturation and luminance unchanged. hueMod: Yields the input color with its hue modulated by the given percentage. sat: Yields the input color with the specified saturation, but with its hue and luminance unchanged. Typically saturation values fall in the range [0%, 100%]. satOff: Yields the input color with its saturation shifted, but with its hue and luminance unchanged. satMod: Yields the input color with its saturation modulated by the given percentage. A 50% saturation modulate reduces the saturation by half. A 200% saturation modulate doubles the saturation. lum: Yields the input color with the specified luminance, but with its hue and saturation unchanged. Typically, luminance values fall in the range [0%,100%]. lumOff: Yields the input color with its luminance shifted, but with its hue and saturation unchanged. lumMod: Yields the input color with its luminance modulated by the given percentage. A 50% luminance modulate reduces the luminance by half. A 200% luminance modulate doubles the luminance. red: Yields the input color with the specified red component, but with its green and blue components unchanged. redOff: Yields the input color with its red component shifted, but with its green and blue components unchanged.

redMod: Yields the input color with its red component modulated by the given percentage. A 50% red modulate reduces the red component by half. A 200% red modulate doubles the red component. green: Yields the input color with the specified green component, but with its red and blue components unchanged. greenOff: Yields the input color with its green component shifted, but with its red and blue components unchanged. greenMod: Yields the input color with its green component modulated by the given percentage. A 50% green modulate reduces the green component by half. A 200% green modulate doubles the green component. blue: Yields the input color with the specified blue component, but with its red and green components unchanged. blueOff: Yields the input color with its blue component shifted, but with its red and green components unchanged. blueMod: Yields the input color with its blue component modulated by the given percentage. A 50% blue modulate reduces the blue component by half. A 200% blue modulate doubles the blue component. gamma: Yields the sRGB gamma shift of its input color. invGamma: Yields the inverse sRGB gamma shift of its input color.